Symmetric Wide-Input-Voltage Range Boost Z-Source DCDC Converter With Reduced Current of Source and Active Components

This study proposes a new enhanced boost dc/dc converter with high-voltage boost ability. The proposed converter takes the advantage of a continuous source current with negligible ripple, and the start-up inrush current is limited as well. Compared with the traditional extended switched-boost dc-dc converter, this converter generates higher output voltage while the numbers of components in the Z-source network of both converters are the same. Moreover, the peak values of the currents provided by the input source and crossing the active devices are reduced. In addition, the ripples of the previously mentioned currents are noticeably decreased in this topology; thus, the losses are reduced. In this article, the operation principles in continuous-conduction mode and discontinuous-conduction mode, the voltage gain, and the parameters design of the proposed converter are analyzed. Finally, by presenting the simulation and experimental results, the performance of the proposed converter is assessed.

Automated summary

The study presents a new enhanced boost dc/dc converter that has high-voltage boost ability. This converter utilizes a continuous source current with negligible ripple and limits the start-up inrush current. Compared to traditional extended switched-boost dc-dc converters, this converter achieves higher output voltage with the same number of components in the Z-source network. It also reduces peak values of input source currents and currents crossing the active devices, as well as decreases ripples, resulting in reduced losses.